Abstract: In recent years, the safety of structures against blast loading has become a major concern due to increasing threats from accidental explosions and terrorist activities. Blast loads are highly dynamic and impulsive in nature, which can cause severe damage to structural elements and may lead to progressive collapse if not properly considered in design. The present study focuses on the development of a blast-resistant structural system for critical infrastructure by analyzing the behavior of a multi-storey reinforced concrete (RCC) building subjected to blast loads. A G+10 RCC building is modeled and analyzed using ETABS 21 software under different blast scenarios considering TNT explosive charges of 100 kg and 150 kg with stand-off distances of 15 m and 20 m. A total of 36 models are developed by varying shear wall configurations such as bare frame, core shear walls, corner shear walls, and combined systems. The blast loads are calculated using standard methods and applied as joint loads on the structure. The structural performance is evaluated based on parameters such as story displacement, story drift, base shear, stiffness, time period, and modal participation. The results indicate that the inclusion of shear walls significantly improves the structural response under blast loading. Among all models, the structure with combined shear walls at core and corners (Model-9) shows the best performance with maximum reduction in displacement and drift and increased stiffness. The study concludes that proper placement of shear walls plays a crucial role in enhancing blast resistance and ensuring structural safety. The findings of this research can be useful for designing safer and more resilient structures against blast effects.
Gahane et al. (Thu,) studied this question.